Thermoelectric　(TE)　materials　are　functional　materials　that　can　directly　convert　heat　energy　into　electrical　energy,　and　have　a　positive　effect　on　alleviating　the　energy　crisis.　Inorganic　semiconductor　materials　have　attracted　extensive　attention　due　to　their　excellent　TE　properties,　among　which　Bi2Te3　is　the　best　and　most　widely　used　inorganic　TE　material　at　room　temperature.　However,　inorganic　TE　materials　are　still　restricted　by　unfavorable　factors　such　as　scarcity　of　raw　material　resources,　heavy　metal　pollution,　high　price,　high　rigidity,　and　complex　processing　technology,　which　greatly　limit　their　development　process.　Therefore,　it　is　urgent　to　develop　flexible　TE　materials　with　high　performance,　non-polluting,　non-toxic　and　low　price.　The　combination　of　silk　fibroin　and　inorganic　TE　materials　not　only　retains　the　properties　of　TE　materials,　but　also　improves　their　flexibility.　Here,　the　Bi2Te3/SF　TE　films　are　successfully　fabricated　by　the　evaporation-assisted　self-assembly　method　with　Seebeck　coefficient　of　199　μV⋅K−1　(p-type)　and　−240　μV⋅K−1　(n-type).　In　order　to　verify　the　feasibility　of　collecting　and　utilizing　ambient　heat　energy　in　real　life,　the　Bi2Te3/SF　TE　films　are　cut　into　various　patterns　(such　as,　flower,　rabbit,　tree,　etc)　to　collect　wasted　ambient　heat.　Further,　the　Bi2Te3/SF　thermoelectric　generator　(TEG)　reaches　a　maximum　power　of　21　nW　at　a　temperature　difference　of　43.5　K.　A　series　of　self-power　temperature　sensing　demonstrations　from　single　TE　film,　TEG,　to　TEG　array　are　proposed　to　demonstrate　their　potential　applications　in　the　field　of　self-power　sensors.　Finally,　by　inserting　Bi2Te3/SF　TEG　array　into　a　bracelet,　a　self-powered　smart　bracelet　can　be　successfully　constructed,　demonstrating　the　feasibility　of　the　Bi2Te3/SF　TE　film　in　the　development　of　self-powered　wearable　electronics.　©　2024　Elsevier　B.V.